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Onoff

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Posts: 41
Reply with quote  #1 
Good evening,

Not been in here for a while with anything to contribute, just lurking!

I'm trying to find details on a tubular plastic heat exchanger I'm sure I saw in here somewhere.

I'm thinking to DIY a single room MVHR unit for my new bathroom which is the only fully insulated room in the house and is also enveloped in a vapour control layer. A long tubular design would work well given the space I have.

I'm sure on here there was one based around what we call soil pipe in the UK?

Thanks

gbwillson

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Posts: 2,256
Reply with quote  #2 
Tubular plastic heat exchanger? Is this to warm outside fresh air before entering your home? 

Are these what you are thinking about?

http://simplysolar.supporttopics.com/post/my-first-project-downspout-hrv-preheater-6657362?&trail=10

http://simplysolar.supporttopics.com/post/kevin-h-air-exchanger-preheater-6581128?pid=1280226932







Greg in MN
Onoff

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Posts: 41
Reply with quote  #3 
Thanks for coming back. This is to make a single room MVHR unit for my bathroom. Thus I'd extract warm moist air from inside the room and vent that over a heat exchanger. Cold air coming in would be warmed. I’d (theoretically) put the inlet on the outside of the bathroom door and extract above the shower and then the flow is near perfect for taking warm moist air away. This is the concept:
imgres-33-300x158.jpeg.bc56ffb34d28d431ec949ce5871d3d45.jpeg 

It suits my room layout:

1291661351_2018-06-2809_52_59.jpg.af40df22ec00434a3324090c5d0f655b.jpg 
I was going to do a hybrid where instead of tubes I'd use spaced Coroplast:

20180628_104651.thumb.jpg.ebd09cd85ccd17d6cb866e24c893f552.jpg 



SolarInterested

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Posts: 1,028
Reply with quote  #4 
Gerry over at Build-It-Solar tried something similar:
https://www.builditsolar.com/Experimental/DryerHX/DryerHXTest1.htm


[img14]

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Onoff

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Posts: 41
Reply with quote  #5 

I've got various 110mm soil fittings destined for the rubbish tip where the rubber's perished. Thinking they might do for a tubular heat exchanger if I ditched the rubber and just CT1'd (a one tube fix all in the UK) them onto the tubes?

 

Is longer better with a tubular heat exchanger?

 

I'm not sure what inlet outlet is which as in what goes inside / outside?

 

imgres-33-300x158.jpeg

 

Tube Inlet - In the bathroom, takes in warm moist air?

Tube Outlet - Vents externally in soffit?

Shell Outlet - ?

Shell Inlet?

 

Ta.

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